Abstract

Lock acquisition of a suspended optical cavity can be a highly stochastic process and is therefore nontrivial. Guided lock is a method to make lock acquisition less stochastic by decelerating the motion of the cavity length based on an extrapolation of the motion from an instantaneous velocity measurement. We propose an improved scheme that is less susceptible to seismic disturbances by incorporating the acceleration as a higher-order correction in the extrapolation. We implemented the new scheme in a 300-m suspended Fabry–Perot cavity and improved the success rate of lock acquisition by a factor of 30.

© 2017 Optical Society of America

Guided lock acquisition in a suspended Fabry–Perot cavity

Jordan Camp, Lisa Sievers, Rolf Bork, and Jay Heefner
Opt. Lett. 20(24) 2463-2465 (1995)

Automatic alignment-control system for a suspended Fabry–Perot cavity

K. Kawabe, N. Mio, and K. Tsubono
Appl. Opt. 33(24) 5498-5505 (1994)

Fringe-counting technique used to lock a suspended interferometer

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Doppler-induced dynamics of fields in Fabry–Perot cavities with suspended mirrors

Malik Rakhmanov
Appl. Opt. 40(12) 1942-1949 (2001)

Dynamic models of Fabry-Perot interferometers

David Redding, Martin Regehr, and Lisa Sievers
Appl. Opt. 41(15) 2894-2906 (2002)